I was looking at the statistics of this guy, and I found something of a conceptual conflict. I realise that the Rotting Leviathan is supposed to be the tank monster, being both undead and having 150 armour, but low/middling weapon strength (they removed the missile resist from the crabs in the beta I believe). In essence, he's just a larger Rotting Promethean.
However, for some reason, unlike the Rotting Prometheans (38MA/42MD), his MD is lower than his MA (52MA/42MD). I find that rather odd.
My thoughts were to switch around his MA and MD (42MA/52MD) to better reflect his identitity as the ultimate undead tank monster.